From f41a753e7514bbeb92a7effbaaaa76b4cbfd2511 Mon Sep 17 00:00:00 2001 From: Jacques Lucke Date: Thu, 20 May 2021 12:22:13 +0200 Subject: Geometry Nodes: new Material Assign node This adds a new Material Assign node. It can be used to change the material used by an existing mesh or to assign a material to a mesh that has been generated from scratch. Differential Revision: https://developer.blender.org/D11155 --- source/blender/blenkernel/BKE_node.h | 1 + source/blender/blenkernel/intern/node.cc | 1 + source/blender/nodes/CMakeLists.txt | 1 + source/blender/nodes/NOD_geometry.h | 1 + source/blender/nodes/NOD_static_types.h | 1 + .../geometry/nodes/node_geo_material_assign.cc | 98 ++++++++++++++++++++++ 6 files changed, 103 insertions(+) create mode 100644 source/blender/nodes/geometry/nodes/node_geo_material_assign.cc (limited to 'source') diff --git a/source/blender/blenkernel/BKE_node.h b/source/blender/blenkernel/BKE_node.h index 8824ffc5695..5ee4f5f5a99 100644 --- a/source/blender/blenkernel/BKE_node.h +++ b/source/blender/blenkernel/BKE_node.h @@ -1423,6 +1423,7 @@ int ntreeTexExecTree(struct bNodeTree *ntree, #define GEO_NODE_ATTRIBUTE_CURVE_MAP 1046 #define GEO_NODE_CURVE_RESAMPLE 1047 #define GEO_NODE_ATTRIBUTE_VECTOR_ROTATE 1048 +#define GEO_NODE_MATERIAL_ASSIGN 1049 /** \} */ diff --git a/source/blender/blenkernel/intern/node.cc b/source/blender/blenkernel/intern/node.cc index a0e444186f2..6f961657d16 100644 --- a/source/blender/blenkernel/intern/node.cc +++ b/source/blender/blenkernel/intern/node.cc @@ -5055,6 +5055,7 @@ static void registerGeometryNodes() register_node_type_geo_edge_split(); register_node_type_geo_is_viewport(); register_node_type_geo_join_geometry(); + register_node_type_geo_material_assign(); register_node_type_geo_mesh_primitive_circle(); register_node_type_geo_mesh_primitive_cone(); register_node_type_geo_mesh_primitive_cube(); diff --git a/source/blender/nodes/CMakeLists.txt b/source/blender/nodes/CMakeLists.txt index a1d7e6c8522..ed2a6a24569 100644 --- a/source/blender/nodes/CMakeLists.txt +++ b/source/blender/nodes/CMakeLists.txt @@ -167,6 +167,7 @@ set(SRC geometry/nodes/node_geo_edge_split.cc geometry/nodes/node_geo_is_viewport.cc geometry/nodes/node_geo_join_geometry.cc + geometry/nodes/node_geo_material_assign.cc geometry/nodes/node_geo_mesh_primitive_circle.cc geometry/nodes/node_geo_mesh_primitive_cone.cc geometry/nodes/node_geo_mesh_primitive_cube.cc diff --git a/source/blender/nodes/NOD_geometry.h b/source/blender/nodes/NOD_geometry.h index 76c9ab8a502..879092f1476 100644 --- a/source/blender/nodes/NOD_geometry.h +++ b/source/blender/nodes/NOD_geometry.h @@ -55,6 +55,7 @@ void register_node_type_geo_curve_resample(void); void register_node_type_geo_edge_split(void); void register_node_type_geo_is_viewport(void); void register_node_type_geo_join_geometry(void); +void register_node_type_geo_material_assign(void); void register_node_type_geo_mesh_primitive_circle(void); void register_node_type_geo_mesh_primitive_cone(void); void register_node_type_geo_mesh_primitive_cube(void); diff --git a/source/blender/nodes/NOD_static_types.h b/source/blender/nodes/NOD_static_types.h index 8e4839310d1..3b2c7feb00e 100644 --- a/source/blender/nodes/NOD_static_types.h +++ b/source/blender/nodes/NOD_static_types.h @@ -294,6 +294,7 @@ DefNode(GeometryNode, GEO_NODE_CURVE_TO_MESH, 0, "CURVE_TO_MESH", CurveToMesh, " DefNode(GeometryNode, GEO_NODE_EDGE_SPLIT, 0, "EDGE_SPLIT", EdgeSplit, "Edge Split", "") DefNode(GeometryNode, GEO_NODE_IS_VIEWPORT, 0, "IS_VIEWPORT", IsViewport, "Is Viewport", "") DefNode(GeometryNode, GEO_NODE_JOIN_GEOMETRY, 0, "JOIN_GEOMETRY", JoinGeometry, "Join Geometry", "") +DefNode(GeometryNode, GEO_NODE_MATERIAL_ASSIGN, 0, "MATERIAL_ASSIGN", MaterialAssign, "Material Assign", "") DefNode(GeometryNode, GEO_NODE_MESH_PRIMITIVE_CIRCLE, def_geo_mesh_circle, "MESH_PRIMITIVE_CIRCLE", MeshCircle, "Circle", "") DefNode(GeometryNode, GEO_NODE_MESH_PRIMITIVE_CONE, def_geo_mesh_cone, "MESH_PRIMITIVE_CONE", MeshCone, "Cone", "") DefNode(GeometryNode, GEO_NODE_MESH_PRIMITIVE_CUBE, 0, "MESH_PRIMITIVE_CUBE", MeshCube, "Cube", "") diff --git a/source/blender/nodes/geometry/nodes/node_geo_material_assign.cc b/source/blender/nodes/geometry/nodes/node_geo_material_assign.cc new file mode 100644 index 00000000000..8c245afd3d2 --- /dev/null +++ b/source/blender/nodes/geometry/nodes/node_geo_material_assign.cc @@ -0,0 +1,98 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "node_geometry_util.hh" + +#include "UI_interface.h" +#include "UI_resources.h" + +#include "DNA_mesh_types.h" +#include "DNA_meshdata_types.h" + +#include "BKE_material.h" + +static bNodeSocketTemplate geo_node_material_assign_in[] = { + {SOCK_GEOMETRY, N_("Geometry")}, + {SOCK_MATERIAL, N_("Material")}, + {SOCK_STRING, N_("Selection")}, + {-1, ""}, +}; + +static bNodeSocketTemplate geo_node_material_assign_out[] = { + {SOCK_GEOMETRY, N_("Geometry")}, + {-1, ""}, +}; + +namespace blender::nodes { + +static void assign_material_to_faces(Mesh &mesh, const VArray &face_mask, Material *material) +{ + int new_material_index = -1; + for (const int i : IndexRange(mesh.totcol)) { + Material *other_material = mesh.mat[i]; + if (other_material == material) { + new_material_index = i; + break; + } + } + if (new_material_index == -1) { + /* Append a new material index. */ + new_material_index = mesh.totcol; + BKE_id_material_eval_assign(&mesh.id, new_material_index + 1, material); + } + + mesh.mpoly = (MPoly *)CustomData_duplicate_referenced_layer(&mesh.pdata, CD_MPOLY, mesh.totpoly); + for (const int i : IndexRange(mesh.totpoly)) { + if (face_mask[i]) { + MPoly &poly = mesh.mpoly[i]; + poly.mat_nr = new_material_index; + } + } +} + +static void geo_node_material_assign_exec(GeoNodeExecParams params) +{ + Material *material = params.extract_input("Material"); + const std::string mask_name = params.extract_input("Selection"); + + GeometrySet geometry_set = params.extract_input("Geometry"); + + geometry_set = geometry_set_realize_instances(geometry_set); + + if (geometry_set.has()) { + MeshComponent &mesh_component = geometry_set.get_component_for_write(); + Mesh *mesh = mesh_component.get_for_write(); + if (mesh != nullptr) { + GVArray_Typed face_mask = mesh_component.attribute_get_for_read( + mask_name, ATTR_DOMAIN_FACE, true); + assign_material_to_faces(*mesh, face_mask, material); + } + } + + params.set_output("Geometry", std::move(geometry_set)); +} + +} // namespace blender::nodes + +void register_node_type_geo_material_assign() +{ + static bNodeType ntype; + + geo_node_type_base(&ntype, GEO_NODE_MATERIAL_ASSIGN, "Material Assign", NODE_CLASS_GEOMETRY, 0); + node_type_socket_templates(&ntype, geo_node_material_assign_in, geo_node_material_assign_out); + ntype.geometry_node_execute = blender::nodes::geo_node_material_assign_exec; + nodeRegisterType(&ntype); +} -- cgit v1.2.3